# Lesson Notes By Weeks and Term - Senior Secondary 1

Isometric drawing 2

TERM – 3RD TERM

WEEK EIGHT

Class: Senior Secondary School 1

Age: 15 years

Duration: 40 minutes of 5 periods each

Date:

Subject: Technical Drawing

Topic: ISOMETRIC DRAWING 2

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Construct given objects in isometric view.

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

 PRESENTATION TEACHER’S ACTIVITY STUDENT’S ACTIVITY STEP 1 INTRODUCTION The teacher guide students to construct various objects using isometric projection. Students listens attentively to the teacher and also participate actively STEP 2 NOTE TAKING The teacher writes a summarized note on the board The students copy the note in their books

NOTE

ISOMETRIC DRAWING 2

Construction of simple objects in isometric projection

To construct any object in isometric form requires first, the construction of the isometric axis. Secondly, the application of the principles of parallel lines to insert the various lines and parts that form the object.

The axis serves as the reference lines from where others are copied. And with the use of drawing tools and material, an object of desirable quality will result.

Procedure

Follow the steps given to draw an isometric sketch of an 8 × 3 × 3 cuboid. The same steps can be used to draw an isometric sketch of a cube also.

1. Draw an isometric sketch of a cuboid with dimension 8 × 3 × 3
2. Draw the front face, join 8 dots to form the length of the cuboid and 3 adjacent dots to form its breadth.
3. From the corners of the rectangle, draw 4 parallel line segments.
4. Join the corners of the image together
5. According to the convention redraw the hidden edges as dotted lines

EVALUATION: 1. Draw an isometric sketch of a cube measuring 3x3x3.

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively